In this paper, series of full-scale cutting tests and cutting simulations are carried out to investigate the influence of installation parameter and geometry of the pick on cutting performance. The discrete element method is used to simulate the rock cutting process. A general process to calibrate macro properties of rock including uniaxial compressive strength (UCS), elastic modulus, Poisson’s ratio, cohesion and internal friction angle is proposed and used to complete the calibration of coal model. The cutting simulations are performed using picks with different tip angles and rake angles. The results show that the peak cutting force (PCF) decreases with the increase of rake angle following an inverse proportional function when the rake angle is positive, while it varies following a parabolic curve in the condition of negative rake angle. Moreover, the crack mode changes from primarily shear failure to primarily tensile failure with the increase of rake angle. Finally, a multiple-attribute index is proposed to evaluate the cutting performance and select the optimum cutting parameters.

本文进行了一系列的全尺寸切削测试和切削模拟，以研究安装参数和截齿的几何形状对切削性能的影响。离散元方法用于模拟岩石切割过程。提出了校准岩石宏观特性的通用过程，包括单轴抗压强度（UCS），弹性模量，泊松比，内聚力和内摩擦角，并用于完成煤模型的校准。切削模拟是使用具有不同刀尖角和前角的截齿进行的。结果表明，当前角为正时，峰值切削力（PCF）随前角成反比函数而减小，而在前角为负时，切削力随抛物线变化而变化。此外，随着前角的增加，裂纹模式从主要的剪切破坏变为主要的拉伸破坏。最后，提出了一种多属性指标来评价切削性能并选择最佳切削参数。